Eriksen, Niklas, and Jonas Sjöstrand. “Equidistributed Statistics on Matchings and Permutations”. The Electronic Journal of Combinatorics 21, no. 4 (November 27, 2014): P4.43. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v21i4p43.